Ultra-Orthodox Jewish boys stand on a pile of wood to be burnt later as part of celebrations for the Jewish holiday of Lag Ba'Omer in the city of Ashdod, Israel May 25, 2016. This day marks the hillula (celebration, interpreted by some as anniversary of death) of Rabbi Shimon bar Yochai, a Mishnaic sage and leading disciple of Rabbi Akiva in the 2nd century, and the day on which he revealed the deepest secrets of kabbalah in the form of the Zohar (Book of Splendor), a landmark text of Jewish mysticism. This association has spawned several well-known customs and practices on Lag BaOmer, including the lighting of bonfires, pilgrimages to the tomb of Bar Yochai in the northern Israeli town of Meron, and various customs at the tomb itself. (Photo by Amir Cohen/Reuters)





An Ultra-Orthodox Jewish boy looks at a bonfire as he celebrates the Jewish holiday of Lag Ba'Omer in the city of Ashdod, Israel May 25, 2016. (Photo by Amir Cohen/Reuters)





Ultra-Orthodox Jews dance next to a bonfire during celebrations for the Jewish holiday of Lag Ba-Omer in Jerusalem's Mea Shearim neighbourhood May 25, 2016. (Photo by Ronen Zvulun/Reuters)





Ultra-Orthodox Jews stand next to a bonfire during celebrations for the Jewish holiday of Lag Ba-Omer in Jerusalem's Mea Shearim neighbourhood May 25, 2016. (Photo by Ronen Zvulun/Reuters)





Ultra-Orthodox Jews stand next to a bonfire during celebrations for the Jewish holiday of Lag Ba-Omer in Jerusalem's Mea Shearim neighbourhood May 25, 2016. (Photo by Ronen Zvulun/Reuters)





Ultra-Orthodox Jews light a bonfire during celebrations for the Jewish holiday of Lag Ba-Omer in Jerusalem's Mea Shearim neighbourhood May 25, 2016. (Photo by Ronen Zvulun/Reuters)





Ultra-Orthodox Jewish boy stands next to a bonfire during celebrations for the Jewish holiday of Lag Ba-Omer in Jerusalem's Mea Shearim neighbourhood May 25, 2016. (Photo by Ronen Zvulun/Reuters)





Ultra-Orthodox Jewish girls look through a window at a bonfire during celebrations for the Jewish holiday of Lag Ba-Omer in Jerusalem's Mea Shearim neighbourhood May 25, 2016. (Photo by Ronen Zvulun/Reuters)





An Ultra-Orthodox Jewish boy stands around a bonfire as he celebrates the Jewish holiday of Lag Ba'Omer in the city of Ashdod, Israel May 25, 2016. (Photo by Amir Cohen/Reuters)





An Ultra-Orthodox Jewish woman walks with a stroller near a bonfire, as she celebrates the Jewish holiday of Lag Ba'Omer in the city of Ashdod, Israel May 25, 2016. (Photo by Amir Cohen/Reuters)





Ultra-Orthodox Jewish boys dance near a bonfire as they celebrate the Jewish holiday of Lag Ba'Omer in the city of Ashdod, Israel May 25, 2016. (Photo by Amir Cohen/Reuters)





An Ultra-Orthodox Jewish boy prays by a bonfire as he celebrates the Jewish holiday of Lag Ba'Omer in the city of Ashdod, Israel May 25, 2016. (Photo by Amir Cohen/Reuters)